Carbonate Ion Dissociation in Fused Alkali Nitrates

An Electrochemical Study of Nitrite and Oxide in Sodium Nitrate-Potassium Nitrate Eutectic Melts.

“…The stripping of microdeposits of silver from graphite (6) and of nickel from platinum (5) give similar behavior. Thus, it would be helpful to know more about the nature of the multiple peaks, and further studies are being carried out in this laboratory.…”

“…which he suggests is attributable to oxide; no other references have been found for the voltammetric determination of this species. Many methods, however, for adding oxide ion to nitrate melts have appeared in the literature (6,7,13,(17)(18)(19)(20); thus far no simple direct method has been suggested which does not leave some question as to the stoichiometry involved.…”

“…Kust and Duke (7) have electrochemically reduced oxygen gas at a Pt electrode and also claim to have obtained stoichiometric concentrations of oxide ion. Kust (6) added oxide via carbonate ion, but showed the decomposition-i.e., C03~2 = C02 + O-2 to be too incomplete for our purposes.…”

Molten salts-modified MgO-based adsorbents for intermediate-temperature CO2 capture: A review

“…They suggested that the molten alkali metal nitrates are shown to prevent the formation of a rigid, CO 2 -impermeable, unidentate carbonate layer on the surfaces of the MgO particles, and promote the rapid generhttp://engine.scichina.com/doi/10.1016/j.jechem.2017.06.005 ation of carbonate ions to allow the high rate of CO 2 uptake. It is also reported that the dissociation of carbonates is accelerated in molten alkali metal nitrates by the favorable solvation of oxide ions [44] . The molten nitrates may facilitate the rapid decomposition of MgCO 3 at low temperatures, allowing regeneration of the particles without agglomeration, and concomitant excellent cyclic regenerability of these samples as well [43] .…”

Nonvolatile Colloidal Dispersion of MgO Nanoparticles in Molten Salts for Continuous CO2 Capture at Intermediate Temperatures

“…The highest uptake capacity by the sample with 20 wt % MgO nanoparticles exceeded 10.7 wt % over 4 h of reaction with CO 2 at 280 °C. The desorption of CO 2 during regeneration at a fairly low temperature of 300 °C under N 2 was accelerated by the nitrate salts which facilitated the dissociation of the carbonates. ,, The cyclic absorption–desorption test in this case, however, shows a lowering of uptake capacity with increasing cycle number, as shown in Figure c.…”